[AT] another Cub engine question

[Greg Hass]

I have a "49" Cub and for 33 years we used an IH 64 combine with a Cub 
power unit. I always wondered how the power unit could run that 
combine.  Several years after we no longer had the combine I bought my 
Cub; well, it always sounded different than the power unit. A while 
later I came across the manual for the power unit and while looking 
through it I saw it was listed as running at 2900 RPM as opposed  to 
1800 RPM for the Cub which explains the power difference.  My question 
is this; I talked to a guy a couple of towns over that dealt with only 
old IH equipment. He seemed very up to date on Cubs and he claimed that 
because of the higher RPM's the Cub power unit had a balanced crankshaft 
as opposed to a standard crankshaft in a Cub tractor. Since then I have 
always wondered if that is true and if someone on this list has the answer.
          Greg Hass